USB: ftdi_sio: use generic chars_in_buffer
Use generic chars_in_buffer rather than copying it's implementation.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 06b5d75..9fe3a2e 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -2093,16 +2093,11 @@
{
struct usb_serial_port *port = tty->driver_data;
struct ftdi_private *priv = usb_get_serial_port_data(port);
- unsigned long flags;
int chars;
unsigned char *buf;
int ret;
- /* Check software buffer (code from
- * usb_serial_generic_chars_in_buffer()) */
- spin_lock_irqsave(&port->lock, flags);
- chars = kfifo_len(&port->write_fifo) + port->tx_bytes;
- spin_unlock_irqrestore(&port->lock, flags);
+ chars = usb_serial_generic_chars_in_buffer(tty);
/* Check hardware buffer */
switch (priv->chip_type) {